<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片试图区 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容"
                    v-model="queryInfo.query"
                    clearable
                    @clear="getGoodsList">
            <el-button slot="append"
                       icon="el-icon-search"
                       @click="getGoodsList()"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary"
                     @click="goAddPage()">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table :data="goodsList"
                border
                stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称"
                         prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)"
                         prop="goods_price"
                         width="120px"></el-table-column>
        <el-table-column label="商品重量(千克)"
                         prop="goods_weight"
                         width="120px"></el-table-column>
        <el-table-column label="创建时间"
                         prop="add_time">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作">
          <!-- 利用作用域插槽的方式接受参数 -->
          <template slot-scope="scope">
            <el-button type="primary"
                       icon="el-icon-edit"
                       size="mini">编辑</el-button>
            <el-button type="danger"
                       icon="el-icon-delete"
                       size="mini"
                       @click="removeById(scope.row.goods_id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页 -->
      <el-pagination @size-change="handleSizeChange"
                     @current-change="handleCurrentChange"
                     :current-page="queryInfo.pagenum"
                     :page-sizes="[10, 15, 20, 25]"
                     :page-size="queryInfo.pagesize"
                     layout="total, sizes, prev, pager, next, jumper"
                     :total="total"
                     background>
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 查询参数对象
      queryInfo: {
        query: "",
        pagenum: 1, // 默认获取第一页的
        pagesize: 10 //每页显示多少条数据
      },
      // 商品列表数组
      goodsList: [],
      //总数据条数
      total: 0
    }
  },
  methods: {
    async getGoodsList () {
      const { data: res } = await this.$ajax.get("/goods", {
        params: this.queryInfo
      })

      if (res.meta.status !== 200) {
        return this.$message.error("获取商品列表失败")
      }
      //成功
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 页码发生改变
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 根据id删除商品
    removeById (id) {
      this.$confirm('此操作将永久删除该条商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$ajax.delete(`/goods/${id}`)

        if (res.meta.status !== 200) {
          return this.$message.error("删除失败")
        }
        this.getGoodsList()

        this.$message({
          type: 'success',
          message: '删除成功!'
        });
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    },
    // 添加商品按钮,去往添加页面
    goAddPage () {
      this.$router.push("/goods/add")
    }
  },
  created () {
    // 根据分页获取对应的分页列表
    this.getGoodsList()
  }
}
</script>

<style lang="less" scope>
</style>